James armstrong



(No Model.)

J. ARMSTRONG.

GOMBINBD SMOKE STACK AND FEED WATER HEATER JE'OR LOCOMOTIVES 7 No. 355,632. E Patented Jan. 4, 1887.

WITNESSES: INVENTOH. PM v 2? N PETER$ PMIn-Liihngrnpimr, Washinglnn. 0.6.

NITED STATES JAMES ARMSTRONG,

or BRIDGEWATER, NEW YORK, ASSIGNOR TOJANE c. ARMSTRONG, or SAME PLACE.

COMBINED SMOKE-STACK AND FEED-WATER HEATER FOR LOCOMOTIVES.

SPECIFICATION forming part of Letters Patent No. 355,632, dated January 4, 1887.

Application filed June 24, 1886. Serial No. 206,086. (No model.)

boilers; and the novelty consists in the pecu-- liar construction and novel arrangement of the various parts, as will be hereinafter more fully set forth, and particularly pointed out in the claims.

The object of myinvention is to provide a device of the class above named wherein the water is'heated before entering the boiler by the passage through the heater of the escaping products of combustion from the firebox and the exhaust-steam from the engine.

A further object of my invention is to provide a combined feed-water heater and smokestack for locomotives and portable steamboiler engines which shall possess superior advantages in points of strength and resistance to steam-pressure, and ready access is afforded to its water chambers and tubes for the purpose of readily and expeditiously cleaning the same when necessary or desirable.

In the accompanying drawings, Figure 1 is a side elevation of the combined feed-water heater and Smokestack shown in position on a boiler, a portion of which only being shown. Fig. 2 is a vertical sectional view on" the line at w of Fig. 3. Fig. 3 is-a top plan of Fig. 2, Fig. 4 is a side elevation, partly in section, of the feed-water heater, showing the guards for the water-circulating tubes. Fig. 5 is a horizontal sectional view of the water-tube guards,

drawings, in which like letters of reference A indicate corresponding parts in all the figures,

A designates the feed-water heater,which consists of an upper and lower water-chamber, a

a, respectively, and the vertical bars or rods a a, secured to the shells of the said chambers by bolts or otherwise. This feed-water heater is provided at its top with an annular projecting flange, b, and a second flange, b, projects upwardly from and is of less diameter than the flange Z), the functions of which flanges b b will be hereinafterdescribed. The said upper and lower water-chambers are each. provided with a central opening or passage, 0, which are arranged in line with each other,to permit of the free passage and escape of the smoke and other products of combustion which escape from the engine, and the said chambers are connected by a series of water-circulating tubes, 0', which open at their extremities into the said chambers to adapt the water to circulate to and' from the chambers through the tubes.

The water-circulating tubes are arranged in series around the central openings of the upper 7 5 and lower water-chambers to utilize the waste heat of the escaping products of combustion and the exhaust-steam from the boiler and the engine of the locomotive. These water-circw lating tubes are expanded at their upper ends I into the lower wall of the upper water-chamher, a, and the lower ends are screwed into the upper wall of thelower water-chamber, a, thereby forming water-tight joints at the j unction of the said tubes with the water-chambers, which effectually prevents the leakage of the water. I

B designates the base of the heater, which may be joined tothc same or formed integral therewith, said base having an opening or pass- 9o cleaned'without removing the same from the heater, and also for other purposes.

d d designate the cold-watcr-inlet pipes,

parallel with the water-tubes o and connected at their upper ends by the turn or bend c, said pipes being provided for the passage: of cold water from the pump or injector ot' the engine to the heater. The said eold-water-inlet pipes pass through thim'bles or sleevese inthe lower and upper water-chambers, ac respectively, and then down through the thimble e of said upper chamber, a. Thence it enters the lower water-chamber, (1,, the lower end of the said pipe (1 being screwed into the upper wall of the lower chamber and making a water-tight joint, thus allowing the passage of cold water to said chamber a without waste. The cold water is thus passed up through the heater between the water-tubes c, and is heated by the exhauststeam from the engine and products of combustion from the fire-box.

Diverging branch pipes F F are connected to the lower end of the cold-water-inlet pipe d, one of the branches being connected to the pump actuated by the engine, while the other is connected to the injector. Each one of the branch pipes is provided with a eheelcvalve, D, which is located in close proximity to the lower end of the eold-water-inlet pipe. By providing each one of these branch pipes with a cheek-valve they are prevented from interfering with each other intheir work, and the back-flow of water and steam from the heater, which is under pressure, is also prevented, which is very desirable and necessary when the pump or injector is to be repaired.

The object of first passing the cold'water through the heater to the water-chamber a, and before it enters the upper chamber, a, is to keep the heater full ofv water at all times, so that a constant circulation of water is insu red, and,seeondly, by passing the cold-water pipe through the thimbles or sleeves of the water-chambers, to allow for the expansion and contraction of the said water-pipe due to the influence of the cold water from the pump thereon from affecting the water-circulating tubes, which connect the upper and lower water'chambers.

G designates the hot-water-outlet pipe, of

substantially the same form as the pipe cl, but

having one of its arms or branches of considerably less length than that of said pipe (1. .This outlet-pipe G receives the water from the upper surface of the water-chambera by means of its short arm or branch, which enters the upper portion of the said chamber, and the outlet-pipe runs downwardly through the thimbles or sleeves g in, the chambers a a, respectively, and connects with a pipe leading to the boiler, into which the water is passed.

1-1 designates the jacket, which incloses the lower and upper chambers and the water-circulating tubes, and serves to prevent the escape of the products of combustion and steam from between the tubes. This inclosing-jacket is made in two sections, 71, which are substantially semi-cylindrical in form and are lapped upon one another at one of their meeting edges, said lapped edges of the sections being secured to one of the vertical bars that connect the upper and lower water -chambers by suitable through-bolts, h". The other edges ofthe jacket-sections are provided with flanges h which are connected together by suitable through-bolts, and the meeting edges of the jacket-sections which have the flanges are disposed immediately in front of the other bar that connects the water-chambers. It will thus be seen that the sections of the inclosingjacket are detachably connected together, so that ready access can be had to the watertubes to clean them.

Each of the water chambers is provided with an annular flange, 'i, which has a series of seats or notches, i, formed therein, said seats being equidistant apart. A series of vertical guard bars or plates, I, are fitted at their upper and lower extremities in the seats of the flanges just described, and the upper ends of the said guard-bars are reduced to form the tongues, which are more sccurel y held in place by keys, as shown. These vertical guard-plates are arranged in front of the watentubes and around the central openings of the heater, to

protect the tubes from injury by the escaping cinders, &c., and'as the guard-plates are arranged equidistant apart in the seats, a series of vertical openings is provided around the central opening of the heater to permit the smoke and exhauststeam to have access to the water-tubes to heat the latter, as will be very readily understood.

The upper water-chamber of the heater is provided with an annular flange, I), hereinbefore described, to which is bolted a cap, J, of the smoke-stack, and the base of the heater rests upon and is bolted to the saddle of the boiler, thus very securely and firmly eonnecting the several parts together.

K designates the blow-off pipe, of any approved pattern, which opens into the lower water-chamber of the heater to discharge the water and sediment from the latter, when de sired.

The operation of my invention will be readily understood from the foregoing description, when taken in connection with the accompanying drawings.

Having thus fully described my invention, what I claim as new is- 1. In a feed-water heater, the combination of the water-chambers,the circulating-tubes intermediate of the said chambers, the inlet-pipe passing through the heater and emptying into the lower water-chamber, and the jacket surrounding the said chambers and tubes and connecting said chambers, substantially as described.

2. In a feed water heater, the combination of the water-chambers, the circulating-tubes intermediate of the chambers, inlet-pipe open ing into the lower chamber, and the outletpipe opening at one end into the upper waterchamber and passing through the heater and lower water-chamber to the boiler, substantially as described,

' 3. In a feed-water heater, the combination of the water-chambers having the aligned central openings, the circulating-tubes intermediate of the chambers and arranged in series around the Openings thereof, and the vertical guard plates or bars secured at their ends to the water-chambers and disposed equidistant apart around the central opening and in front of the water-tubes, substantially as described.

4. In a feed-water heater, the combination of the water-chambers, the circulating-tubes, and the sectional jacket surrounding the chambers and tubes, and detachably bolted together at their meeting edges, substantially as .described.

5. In a feed-water heater, the combination of the water-chambers, the sleeves or thimbles passing through the chambers, the outlet and inlet pipes passing through the sleeves and 6. In a feed-water heater, the combination of the upper and lower water-chambers hav- 'ing the aligned central openings, the circulating-tubes expanded at their upper ends into the upper chamber and screwed into the lower chamber, the sleeves or thimbles fitted into 

